Dfh.a headphones

[Kris]

Dears,

I recently acsuired these headphones.
Great condition but with one cable disconnected from the earpiece.

No just to be sure i don't break it:
Does anyone knows how to open it and reconnect the cable to the earpiece?

Secondly, who was maker 'bmm' ?

Thanks,
Kris

[Jan7]

Dears,

I recently acsuired these headphones.
Great condition but with one cable disconnected from the earpiece.

No just to be sure i don't break it:
Does anyone knows how to open it and reconnect the cable to the earpiece?

Secondly, who was maker 'bmm' ?

Thanks,
Kris

Dear Kris:

As you can seen in this image, for a old book print in 1925, these headphones are habitually conected in a serial conexion.



For the desmontage, you need a plane screwdriver, and possibly lubrifiant oil, to unscrew old pieces. 3 in 1, WD-40....Don't use electrical tools. Possibly, you can acced at the contacts, means these four screws, and could remove the cover and acceed to the contacts.

I search in this page about bmm code http://www.radix.net/~bbrown/codes_full.html, without results.


I hope this helps......




Jan.

[Kris]

Thanks for the info Jan.
I couldn't find bmm either on the internet.

[Jan7]

You are welcome, Kris!

Probe, also, with an ohmmeter, the continuity of the cables.




Jan.

[Kris]

You are welcome, Kris!

Probe, also, with an ohmmeter, the continuity of the cables.




Jan.

of course